Let it perform it's best! This box moves up the rev limiter allowing higher revs. It also has a hotter advance curve from the O.E.M. box. This allows for a bit crisper throttle response and easier starting. Raises rev-limiter 1200 RPM over the O.E.M. ignition. Hotter advance curve for better performance. Direct replacement for the O.E.M. CDI ignition box.